A Monograph of the Formicidae of South Africa. 541 



epinotum and the 2nd node of the petiole very superficially rugulose. 

 Abdomen microscopically alutaceous. Head subglobose, as long as 

 wide, a little wider in front than behind, the posterior margin shallowly 

 concave in the middle. Eyes placed a little behind the middle of the 

 sides. The scapes almost reach the posterior margin ; 3rd-6th joints 

 of the flagellum very little wider than long, the club 3-jointed. The 

 profile of the pro-mesonotum forms a continuous curve, the pro- 

 mesonotal suture obsolete in the middle, at the sides very shallow, or 

 sometimes entirely obsolete. Pro-mesonotum not inarginate, the 

 mesonotum without a distinct declivity. Dorsum of epinotum twice as 

 wide at the apex as Ion?, fairly convex lengthwise, armed with two 

 acute, fairly slender and moderately divergent spines, about one-third 

 as long as the interval between their bases. First segment of petiole 

 as long as wide, at least one and two-thirds wider in front than behind, 

 slightly excavated longitudinally in the middle, the anterior angles 

 widely rounded. Node of 2nd segment very wide, almost twice as 

 wide as long, with a very shallow median groove and the posterior 



Fig. 52. — C. Santschii, Forel, var. ctymene, Forel. 



margin widely emarginate in the middle, distinctly wider than the 1st 

 segment. 



Durban (C. B. Cooper). (G-.A. coll.), 



C. nigeonitens, Santschi. 



^ . 2 - 8-3'8 mm. Black ; tarsi brown, mandibles and flagellum 

 ferruginous, the club brown. Very sparsely pubescent ; pilosity 

 absent except on the clypeus. Very smooth and shining, the head 

 finely and very sparsely punctured, the clypeus and area around the 

 antennal pits superficially rugulose longitudinally. Head, excluding 

 the mandibles, distinctly longer than wide, varying from one-seventh 

 to one-fifth longer, the sides barely convex, nearly as wide in front as 

 behind (in the larger $ £ wider behind than in front), the hind 

 margin almost straight, the posterior angles rounded. Mandibles 

 narrow, longitudinally striate, obtusely 4-dentate. Anterior margin 

 of clypeus feebly convex in the middle. Scapes very short, hardly 

 extending beyond the posterior third of the head ; 2nd to 7th joints of 

 the flagellum wider than long, the club 3-jointed. Eyes almost fiat, 



